fix: add call to getCollection endpoint to add collection attributes

[sahar-fehri]

Explanation

Adds a call to Get collection api on nft-api passing contract address array to retrieve missing collection attributes.

References

Changelog

@metamask/assets-controllers

• ADDED: Your change here added a call to getCollection endpoint to add attributes to collection attribute.

Checklist

• [ ] I've updated the test suite for new or updated code as appropriate
• [ ] I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• [ ] I've highlighted breaking changes using the "BREAKING" category above as appropriate